I am at the phase of installation of TAILS 3.0 where I need to clone TAILS onto my second USB. when I click the install by cloning button the window closes and no menu comes up at all. I am hoping that someone knows a fix for this.
Try restarting with the intermediary but this time, set an Administrator password. Now when booted fully into tails, launch the Terminal and type 'sudo tails-installer-launcher'. It will ask for your Administrator password that you set on start-up. This will provide the Tails installer the proper elevated privileges to install by cloning.
Just use QubesOS, clone the medium - and it will work out of the box. To make things running smoother - keep in mind that if you will use a router VM not of the disposable type(template-based) - clean the keys on a cloned machine before launching router VM, so Tor will generate new ones on startup and it will work just out of the box with all the rest of your settings